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Automatic Derivation of Loop Bounds and Infeasible Paths for WCET Analysis using Abstract Execution
Publication Type:
Conference/Workshop Paper
Venue:
Real-Time in Sweden (RTiS) 2007
Abstract
Static Worst-Case Execution Time (WCET) analysis is a technique to
derive upper bounds for the execution times of programs. Such bounds
are crucial when designing and verifying real-time systems. A key
component for statically deriving safe and tight WCET bounds is
information on the possible program flow through the program.
Such flow information can be provided manually by user annotations, or
automatically by a flow analysis. To make WCET analysis as simple
and safe as possible, it should preferably be automatically derived,
with no or very limited user interaction.In this paper we present a method for deriving such flow information
called abstract execution. This
method can automatically calculate loop bounds, bounds for including nested
loops, as well as many types of infeasible paths.
Our evaluations show that it can calculate WCET estimates
automatically, without any user annotations, for a range of benchmark
programs, and that our techniques for nested loops and infeasible paths
sometimes can give substantially better WCET estimates than using loop
bounds analysis only.
Bibtex
@inproceedings{Gustafsson1006,
author = {Jan Gustafsson and Andreas Ermedahl and Christer Sandberg and Bj{\"o}rn Lisper},
title = {Automatic Derivation of Loop Bounds and Infeasible Paths for WCET Analysis using Abstract Execution},
month = {August},
year = {2007},
booktitle = {Real-Time in Sweden (RTiS) 2007},
url = {http://www.es.mdu.se/publications/1006-}
}